whythiserrorhappens?most likely,when thenewavast2014avastlatestissue,there has been abugwhenupdating,so thatalltheavastupdatethis week(November 2013)had an error/corrupt on thefile“HTMLayout.dll“, when it gets the error avast will crash and disappear

If you still get the error, you can uninstall avast and install it with older/latest version, and if you can’t uninstall avast, use this utility to help you uninstall avast easily (size 341KB), you must run windows in safe mode